Tractor plow



Jan. 9, 1923.

J. S. WITTER.

TRACTOR PLOWl FILED JULY 25.1921.

2 SHEETS--SHEET 2.

patented dann lll, 'lblllt TRACTB, JPL'W.

application tiled Il'uly a5,

y Flows, oli' which the following is a specification. p

My invention relates, `in general terms, to improvements in plows, andother similar groundworliing implements, which are provided with meansto effect automatic adjust* ment olf the implement to overcome immovableobstacles such as large stones and the like encountered in the path or`furrow. More particularly my invention is an improvement upon thoseplows which are drawn across a field by motive power, and which cannotbe followed and manually guided as are horse driven plows. y

lin manipulating the so-ealled tractor plow the operator is seated uponthe tractor in front ot the plow, and as a consequence when an obstacleis encountered he must either stop the tractor or assume the rist: oftinjuring the plow.` ll/ly invention, in order to avoid this undesirablesituation, contemplates the provision ot a longitudinally movable,supplementary` plow beam, to which the plow standard is lpivotallyconnected lor vertical movement only. `(lonnected with the standard andwith the primary plow beam aremcans actuated by the torward movement otthe tractor `tor automatically `exerting an upward. pull upon the plowstandard when an. obstacle is encountered so that the plow share iscaused to ride up and over the obstacle, and then return to its normalposition without stopping the tractor or otherwise engaging theattention o'j the operator.

ln addition to the foregoing desirable features and objects my inventionincludes means, in connection with the supplementary plow beam, :torcompensating and absorbing the shock caused. by contact ot the plowshare with an obstacle; and also means `lor normally holding the plowshare rigidly to its furrow. Furthermore, my invention .is eireeedinglysimple and durable in construction, and includes no intricate or fragileparte which are liable to become broken or otherwise inapt tor use.

To these and other ends, my invention `consists in the construction,arrangement amil` combination ot parts described herein- 1921. SerialNo. 487,246,

after and pointed out in the claims forming a part ot thisspecification.

The principal embodin'ient ot my invention is shown by way of example inthe accompanying drawings, wherein r- Figure l is a side view oli myplow in its normal operative position.

Figure 2, is atop plan view.

Figure 3, is a side view et my plow atteiit has engaged an obstacle, andthe primary plow beam is in section to show the eleva-td ing` andeoinpensating` mechanism used in conjunction with. the standard andsupplementary plow beam.

Figure et, is a section .taken on the line -lf--l of `lligure 3. l

lligure o, is a perspective view et my supplemental plow beam, and

Figure 6, is a perspective view of the plow standard.

Like cha` `act-ers oit reference reiter to lilte or similar partetl'iroughout the several views oi the drawings, in which i rthe numeral(l) designates a conventional plow share carrying the usual mold beard(2), and these are bolted to the stand rd (3) through openings (t)provided therein.

The standard has :mounted in opposed brackets (5) arranged on its.horizontal reach, a vertical post to which is se-` cured one terminalend oit a chain rlilie terminal end ot the horizontal reach ot thestandard (3) is reduced ttor insertion be` tween the arms (8) of thebilfureated end of a supplemental plow beam and a bolt (l0) is passedtherethrough to pivotally con` neet the standard with the supplementalplow beam for vertical movement only.

lhe supplemental plow beam (9) is 1novably arranged between the sideplatos (ll) ot a primary plow beam (i2), and rides between the top andbottom plates (t3) which hold the side plates (ll) together and term thebody ol the primary plow beam. Mount-ed between the side plates (lll) atthe forward end of the primary plow beam is a triangular block (141-.)to which is engaged the other end et the eliain (7), and an end crossbar (l5) between the side plates car ries the fitting tor attaching theplow to a tractor (not shown). Secured to the block (la) at a pointbelow the chain (7), and engaged with the remaining end ol: thesupplemental plow beam (9) is a contractile coil spring (i6) whichnormally holds the supplemental plow beam, and a por'ien ot llt) :lili

the primary plow beam as slimvn by the dotted lines in lt'ignre l. lllhen in this position the plow assembly heleL rigid by the plates (13) toretain the plow share in its furrow, and the chain (7') is relaxed andrest-s upon the upper plate (13) as in Figure 1.

W hen the plow share engages an obstacle as shown in Figure 8, thepriman7 plow beam is drawn 'forward against` the tension ot the coilspring` until the pivotal connection between the stan and thesnpplemental beam is without le primary plow beam, and the standard isconsequently free to move vertically, as shown in Figure 3. lVhen inthis position the chain (7) being connected with tie block (le) ot theprimary plow beam exerts sufficient orce to elevate the standard andcause the plow share to ride up and over the obstacle as illustrated.ils soon as the obstacle h heen passed the double e et ol the 'lorce olgravity rand the tension of the coil spring; (16) causes thesupplemental plow ber-fi and standard to resume their normal operativeposition. lt will be seen that the etect oi" the coil spring (lo) isalso to compensate for the shock clue to Contact of the plow share withstones and the like, and as the slow forward. movement ol' the tractor(not shown) is ycontinuons the action of the l art aboveV specified issmooth and extremely effective.

lVhile in the foregoing, there has been illustrated in the drawings anddescribed in the soeciication such combination and arrangement ofelements as constitute the preferred embodiment of my invention, itnevertheless desired to en'iphasir/le the tact that interpretation o'the invention should only be conclusive when made in the light oit thesubjoined claims.

Having described the invention and its objects with such attention todetail as will. thoroughly acquaint one skilled in the artwith itsconstruction and advantages, I claim.

1. A plow comprisinga hollow plow beam, a pivotally mountedlonituclinally movable standard normally locked within the hollow plowbeam against vertical movement, means carried within the hollow plowbeam lor automatically releasingf the standard, and means connectinthestandard with the hollow plow beam ifor automatically elevating thestandard when it is released.

2. A plow comprising a hollow primary plow beam, a pivoted standardnormally locked within the prinmry plow heain against vertical movement,and a supplementary plow beam movablv arranged within the primary plowbeam i'or releasingv` the standard for vertical movement.

3. A plow comprising,r a hollow primary plow beam, a pivoted standardnormally locked within the primall plow heen; against vertical movement,:i supplementary plow beam movably arranged within the primary plow beamand connected with the standard lor automatically releasing; thestandard for vertical movement, and means lor antomatically elevationvthe stand-ml when. it is released.

l. il. plow comprisinga prin'mrxv plow bean, a supplementary plow beam,movably arranged in the primary plow beam, a coll spring connecting thesupplementary plow beam with the primary plow bram, a standard pivotallyconnected with the supplementary plow beam for vertical movement only,and means connecting the standard with the primary plow beam il'orelevating the stainlard npon independent movement ol" the pri marj.'plow beam with respect to the supplementary plow beznn.

il, plow comprisingr a hollow prinnlry plow beam, a supplementory plowlio-nn nioif'ahiy :i han ged within the primary plow beam, a standardhaving its horizontal reach pivotally connected with the snpplemenlnryplow beam, and resilient means connecting 'l l supplementary plow beamwith the priinary plow beam to normally holzl the, same ogg-ether with aportion ell the horizontal 'eich et the standard within the primary )l wbeam for the purpose set forth.

ln testimony whereof, l nllix my signature hereto,

flll

